If you wish to open a symbol in the Symbol Editor, make sure to click the Open Symbol icon (the one that looks like a folder on your tool bar) and not the "Add Existing" button. The "Add Existing" button is to add a symbol to an existing one which will cause A and B tabs because you are creating a multi part symbol.

I am working on a board and I have a part that I want to add that has large rectangular pins for a high current connection (see http://www.digikey.com/product-detail/en/ACS756SCA-100B-PFF-T/620-1238-ND/1829841). Now I understand that PCB123 has a limited drill selection which makes the boards very economical. However, is it possible to create pads with multiple round holes that overlap to create a roughly rectangular hole? Also around the large connections, the specsheet recommends having many smaller vias ...

I don't see any thread such as this, but I've created a number of part templates based on the datasheet mechanical diagram (such as Vicor Maxi modules), and i was wondering if there is a place where users can upload and share their custom footprint and component files?

We currently have a fairly complex parts creation process and the tools are spread about. It would improve the work flow if we could pull all of our parts creation tools into a single interface like the Parts manager. What I would like to see is the Generate footprint button, in Manage Parts, open the layoutNew Footprint tool. This should allow the customer to create or edit an existing footprint from one place. The New ...

Hi Rick, You cannot just simply swap out the associated footprint with a component, this actually requires creating a new component. Here is a post that will step you through the process. PCB Parts Creation

I want to stress that this issue has caused me to redraw my schematic about 10 times. I've also had to redo the layout many times over. I am in the process of creating a library, and each time I find I need to make a change, it is very painful to update the symbol. Saving under a new file name as a work-around is just wrong, as Sunstone has defined the filename to be ...